该基因编码的蛋白质是一种广泛表达的核蛋白。它与其他几种蛋白质直接结合在调节细胞增殖的视网膜母细胞瘤蛋白（prb）上。pRB通过募集编码蛋白来抑制转录这种蛋白质，反过来，作为桥梁分子招募高密度脂蛋白，此外，提供第二个高密度脂蛋白独立的抑制功能编码蛋白具有转录抑制活性已观察到该基因的多个选择性剪接转录本，但并非所有的转录变体都已被完全描述。[由RefSeq提供，2008年7月]
The protein encoded by this gene is a ubiquitously expressed nuclear protein. It binds directly, with several other proteins, to retinoblastoma protein (pRB) which regulates cell proliferation. pRB represses transcription by recruiting the encoded protein. This protein, in turn, serves as a bridging molecule to recruit HDACs and, in addition, provides a second HDAC-independent repression function. The encoded protein possesses transcriptional repression activity. Multiple alternatively spliced transcripts have been observed for this gene, although not all transcript variants have been fully described. [provided by RefSeq, Jul 2008]